.ring{display:flex;align-items:center;justify-content:center;position:relative}.ring,.ring:before{width:200px;height:200px}.ring:before{content:"";position:absolute;top:0;left:0;border-radius:50%;animation:ring 2s linear infinite}@keyframes ring{0%{transform:rotate(0deg);box-shadow:0 5px 5px #ff2121}25%{transform:rotate(90deg);box-shadow:0 5px 5px #fffb21}50%{transform:rotate(180deg);box-shadow:0 5px 5px #2196f3}75%{transform:rotate(270deg);box-shadow:0 5px 5px #bc21ff}to{transform:rotate(1turn);box-shadow:0 5px 5px #ff2121}}